What is a potential effect of a higher octane fuel?

Higher octane fuel serves to prevent engine knocking, which is a form of abnormal combustion that can lead to engine damage and reduced performance. The octane rating of fuel indicates its ability to resist knocking during combustion; fuels with higher octane ratings can withstand greater pressure and temperature before detonating. This characteristic allows for more efficient and smoother combustion within the engine, particularly in high-compression engines designed to take advantage of higher octane levels.

When an engine operates without knocking, it can perform more optimally, leading to better engine efficiency and power output. The design of certain performance engines requires the use of high-octane fuels to maintain proper ignition timing and combustion processes, ensuring that they run smoothly and effectively without detrimental effects. Consequently, using higher octane fuel primarily contributes to the prevention of knocking, enhancing engine longevity and performance.